Major adverse cardiovascular events and mortality after catheter ablation in Japanese patients with atrial fibrillation: The Fushimi AF Registry

Background The impact of catheter ablation (CA) on the long-term clinical outcomes in atrial fibrillation (AF) are unclear due to limited cohort investigations. Methods The Fushimi AF Registry is a community-based prospective survey of patients with AF in Fushimi-ku, Kyoto, Japan. Of 4465 patients enrolled between March 2011 and July 2019, analyses were performed on 2639 patients (492 patients who underwent CA and 2147 patients who received standard rhythm- and/or rate-control drug therapy at baseline). We compared the baseline characteristics and the incidence of major adverse cardiovascular events (MACE: the composite of cardiovascular death, heart failure hospitalization, myocardial infarction, ischemic stroke or systemic embolism), and all-cause mortality during the follow-up using propensity score matching. Results After entering 20 covariates in the current matching analysis, 342 patients who underwent CA and 342 matched patients who received drug therapy, with a median follow-up of 1865 days, were included. The patients who underwent CA were significantly associated with lower incidence of MACE (hazard ratio (HR) 0.56, 95% confidential interval (CI) 0.36-0.86; P = 0.0077), and all-cause mortality (HR 0.47, 95% CI 0.29-0.75; P = 0.0016). Conclusion CA was associated with lower incidences of MACE and all-cause mortality for patients with AF as compared with those who received drug therapy. The most common event of MACE in patients who underwent CA was heart failure hospitalization. Unique identifier UMIN000005834.